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【单选题】
土方路堤必须根据设计断面，分层填筑、分层压实。采用机械压实时，分层的最大松铺厚度，高速公路和一级公路不应超过（ ）A.
20cm
B.
30cm
C.
40cm
D.
50cm
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反馈参考答案：
举一反三
【单选题】we can’t remove our troubles in life forever, we can leave them behind when we are on vocation.
A.
When
B.
While
C.
Unless
D.
Until
【单选题】You can remove the dishes through the large viewing window．
A.
Right
B.
Wrong
C.
Doesn't say
【单选题】From the context, we can see that a lever is a tool which can be used to ______.
A.
remove the wheel from the bike
B.
replace the wheel on the bike
C.
push the tyre back into position
D.
take out the inner tube
【单选题】Neither side is prepared to talk to _____ unless we can remove the misunderstanding between them.
A.
the other
B.
others
C.
another
D.
one other
【简答题】____ we can’t remove our troubles in life for ever,we can leave them behind when we are on vacation. A．When B．While C．Unless D．Until
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